Patent US2635993A successfully refreshed from Google Patents.
US2635993A
Expired / Lapsed
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Electrolytic production of chromium hydride
Assignee: Battelle Development Corp
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Filing: 1948-10-16
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Granted: 1953-04-21
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Expires: 1968-10-16
Abstract
No abstract record available.
Inventors
- 👤 Cloyd A Snavely
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:39
CPC Classifications
C; C25; C25B; C25B1/00; C25B1/01
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
THE METHOD OF PRODUCING ESSENTIALLY PURE FACE-CENTERED CUBIC, CHROMIUM HYDRIDE, WHICH COMPRISES PASSING AN ELECTRIC CURRENT FROM AN ANODE TO A CATHODE THROUGH AN ELECTROLYTIC BATH AT A TEMPERATURE OF FROM 0* C. TO 12* C., SAID BATH CONSISTING OF AN AQUEOUS SOLUTION OF CHROMIUM TRIOXIDE, FROM 5 TO 40 GRAMS PER LITER OF SUGAR, A SUFFICIENT AMOUNT OF A COMPOUND FURNISHING THE SO4 RADICAL SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, SODIUM SULFATE, CALCIUM SULFATE, AND CHROMIUM SULFATE TO GIVE A CHROMIUM TRIOXIDE TO ACID RADICAL RATIO OF 300 TO 1, WHILE MAINTAINING THE CURRENT DENSITY OF THE CELL FROM 105 TO 125 AMPERES PER SQUARE FOOT WITH THE CONCENTRATION OF CHROMIUM TRIOXIDE IN THE SUBSTANTIALLY INVERSE RATIO OF 1100 TO 900 GRAMS PER LITER.
Claim 2
Independent Claim
127 words
THE METHOD OF PRODUCING ESSENTIALLY PURE FACE-CENTERED CUBIC, CHROMIUM HYDRIDE, WHICH COMPRISES PASSING AN ELECTRIC CURRENT FROM AN ANODE TO A CATHODE THROUGH AN ELECTROLYTIC BATH AT A TEMPERATURE OF FROM 0* C. TO 12* C., SAID BATH CONSISTING OF AN AQUEOUS SOLUTION OF CHROMIUM TRIOXIDE, FROM 5 TO 40 GRAMS PER LITER OF SUGAR, A SUFFICIENT AMOUNT OF A COMPOUND FURNISHING THE SO4 RADICAL SELECTED FROM THE GROUP CONSISTING OF SULFURIC ACID, SODIUM SULFATE, CALCIUM SULFATE, AND CHROMIUM SULFATE TO GIVE A CHROMIUM TRIOXIDE TO ACID RADICAL RATIO OF 300 TO 1, WHILE MAINTAINING THE CURRENT DENSITY OF THE CELL FROM 105 TO 125 AMPERES PER SQUARE FOOT WITH THE CONCENTRATION OF CHROMIUM TRIOXIDE IN THE SUBSTANTIALLY INVERSE RATIO OF 1100 TO 900 GRAMS PER LITER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-20 | 1956-10-20 | 1957-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-20 | 1960-10-20 | 1961-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-20 | 1964-10-20 | 1965-04-21 | $7700.00 | Window Closed / Lapsed |